Integrated concrete pouring formwork system for underground comprehensive pipe gallery
By forming a cavity between the baffles of the concrete pouring formwork system of the underground integrated pipe corridor and using crimp oscillation components, the problem of oscillation in the prior art is solved, and the compaction and durability of concrete is improved, and the construction steps are simplified.
Patent Information
- Application Number
- CN202510662363.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-22
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2045-05-22
AI Technical Summary
The existing concrete pouring formwork system of the underground comprehensive pipeline corridor needs to use additional equipment to oscillate the poured concrete during the pouring process to ensure the construction quality, and the steps are cumbersome.
An integrated concrete pouring formwork system is designed to cast concrete in the cavity formed between the first baffle and the second baffle, and use a crimp oscillation assembly to oscillate under the impact of concrete gravity and initial velocity during pouring, exhausting air bubbles in the concrete and reducing pores.
The pores of concrete are reduced by crimping oscillation components, the permeability of concrete pipe corridors is reduced, the durability of pipe corridors and the ability to resist water corrosion is improved, and the construction process is simplified.
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Figure CN120193548A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of design and manufacturing of engineering structures, and particularly to an integral concrete pouring formwork system for an underground utility tunnel. Background Art
[0002] An underground utility tunnel refers to an integrated underground urban pipeline corridor, that is, a tunnel space is built underground in a city, integrating various engineering pipelines such as electricity, communication, gas, heating, water supply and drainage, etc., equipped with special inspection openings, hoisting openings and monitoring systems, and implementing unified planning, unified design, unified construction and management, which is an important infrastructure to ensure the operation of the city.
[0003] In the Chinese patent application No. CN202111253820.8, a formwork system is disclosed, especially a formwork system for concrete pouring of an underground utility tunnel, belonging to the technical field of design and manufacturing of building engineering structures. A formwork system for concrete pouring of an underground utility tunnel with relatively low construction cost, which can ensure the construction quality and subsequent use requirements is provided. The formwork system includes a combined U-shaped formwork component and an adjustable universal support component, and the combined U-shaped formwork component is supported by the adjustable universal support component on the pouring base of the tunnel to form a U-shaped pouring cavity.
[0004] Although this patent solves the problems that the classified casting method has poor structural strength and there is a risk of water seepage in the later stage, and the overall construction method has a large volume, large mass and high price, during its pouring process, additional equipment is needed to oscillate the poured concrete to ensure the construction quality, and the steps are cumbersome. Summary of the Invention
[0005] Aiming at the deficiencies of the prior art, the present invention provides an integral concrete pouring formwork system for an underground utility tunnel, which solves the problem that in the prior pouring formwork system, additional equipment is needed to oscillate the poured concrete to ensure the construction quality during the pouring process, and the steps are cumbersome.
[0006] To achieve the above objectives, the present invention is realized through the following technical solutions: An integral concrete pouring formwork system for an underground utility tunnel includes a first baffle and a second baffle. A cavity is formed between the first baffle and the second baffle. The first baffle is connected to a first bearing plate through a press-connecting oscillation component, the second baffle is connected to a second bearing plate through a press-connecting oscillation component, the second bearing plate is connected to a second press-connecting rod component, the first bearing plate is connected to a first press-connecting rod component, and both the first press-connecting rod component and the second press-connecting rod component are connected to a drive shaft.
[0007] Preferably, the driving shaft part is arranged inside the driving shaft sleeve, and a main bevel gear is fixedly connected to the driving shaft. Both the first crimping rod assembly and the second crimping rod assembly include a limiting sleeve which is communicated with the driving shaft sleeve. A secondary bevel gear is arranged inside the limiting sleeve. The secondary bevel gear meshes with the main bevel gear. The secondary bevel gear is fixedly connected to a threaded rotating shaft which is in threaded connection with a screw tube. A connecting block is fixedly connected to the screw tube.
[0008] Preferably, a first limiting ring and a second limiting ring are arranged inside the limiting sleeve. Both the first limiting ring and the second limiting ring are fixedly connected to the inner wall of the limiting sleeve. The first limiting ring is sleeved outside the threaded rotating shaft and is rotatably connected to the threaded rotating shaft. The second limiting ring is sleeved outside the screw tube and is rotatably connected to the screw tube.
[0009] Preferably, a plurality of limiting sleeves are provided.
[0010] Preferably, one end of the driving shaft is located outside the driving shaft sleeve, and a driving handle is fixedly connected to the end of the driving shaft located outside the driving shaft sleeve.
[0011] Preferably, a receiving rod is fixedly connected to the end of the second crimping rod assembly far away from the driving shaft sleeve, and a second bearing plate is fixedly connected to the receiving rod.
[0012] Preferably, the crimping oscillation assembly includes a connecting shell which is fixedly connected to the first bearing plate and / or the second bearing plate. A sliding rod is inserted into the inner wall of the connecting shell and is slidably connected to the inner wall of the connecting shell. A second spring is arranged between the end of the sliding rod close to the connecting shell and the connecting shell. Both ends of the second spring are respectively connected to the sliding rod and the connecting shell. The sliding rod penetrates through a limiting plate which is fixedly connected to the connecting shell. A first slider is fixedly connected to the end of the sliding rod far away from the connecting shell. The first slider is slidably connected to an adjusting plate which is slidably connected to the connecting shell. A first spring is sleeved outside the sliding rod. Both ends of the first spring respectively abut against the limiting plate and the first slider.
[0013] Preferably, a plugging sleeve is slidably connected to the adjusting plate. A plug rod is inserted into the plugging sleeve. A third spring is arranged between the plug rod and the plugging sleeve. Both ends of the third spring are respectively connected to the plug rod and the plugging sleeve. A second slider is rotatably connected to the end of the plug rod far away from the plugging sleeve. The second slider is slidably connected to a connecting plate which is fixedly connected to the first baffle and / or the second baffle. A first inclined surface block is fixedly connected to the plug rod. The first inclined surface block is slidably connected to a second inclined surface block fixed to the connecting shell.
[0014] Preferably, an adjusting rod is fixedly connected to the connecting plate. The adjusting rod is in threaded connection with an adjusting screw rod. The adjusting screw rod is rotatably connected to an intermediate block. Two sets of balance plates are slidably connected to the intermediate block. One end of a connecting rod is rotatably connected to the end of the balance plate away from the intermediate block. The other end of the connecting rod is rotatably connected to a third slider. The third slider is slidably connected to an adjusting plate. One end of a fourth spring is connected to the middle section of the connecting rod, and the other end of the fourth spring is connected to the adjusting plate.
[0015] Preferably, a collar is sleeved outside the plugging sleeve. The collar is slidably connected to the plugging sleeve. Fifth springs are arranged between the collar and the two sets of balance plates.
[0016] Compared with the prior art, the present invention has at least the following beneficial effects: In the present invention, concrete is poured into the cavity formed between the first baffle and the second baffle and solidified to form a pipe gallery. Since both the first baffle and the second baffle are arranged on the press-connecting oscillation assembly, during pouring, impacted by the self-gravity of the concrete and its initial velocity, the press-connecting oscillation assembly oscillates, discharging the air bubbles in the concrete, reducing pores, making the concrete dense, and ensuring the quality of the pipe gallery. By the press-connecting oscillation assembly, the pores of the concrete are reduced, the permeability of the concrete pipe gallery is lowered, thereby improving the durability of the pipe gallery. The ability to resist water erosion is enhanced, and it is avoided that moisture and air corrode the steel bars in the concrete. It solves the problem that in the existing pouring formwork system, additional equipment is needed to oscillate the poured concrete during the pouring process to ensure the construction quality, and the steps are cumbersome. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 is a front view schematic diagram of the main structure of the present invention; Figure 2 is a top view schematic diagram of the main structure of the present invention; Figure 3 is a partial schematic diagram of the main structure of the present invention; Figure 4 is a front view schematic diagram of the structure of the press-connecting oscillation assembly of the present invention.
[0018] In the figure: 1, bottom plate; 2, first baffle; 3, drive shaft; 4, first crimping rod assembly; 5, drive shaft sleeve; 6, second crimping rod assembly; 7, first bearing plate; 8, receiving rod; 9, second bearing plate; 10, crimping oscillation assembly; 11, second baffle; 12, drive handle; 13, main bevel gear; 14, driven bevel gear; 15, first limit ring; 16, screw tube; 17, second limit ring; 18, connecting block; 1001, connecting shell; 1002, slide bar; 1003, first spring; 1004, limit plate; 1005, second spring; 1006, adjusting plate; 1007, plugging sleeve; 1008, first slider; 1009, plug rod; 1010, third spring; 1011, first inclined block; 1012, second inclined block; 1013, second slider; 1014, connecting plate; 1015, adjusting rod; 1016, intermediate block; 1017, adjusting screw; 1018, balance plate; 1019, connecting rod; 1020, third slider; 1021, fourth spring; 1022, collar; 1023, fifth spring. Detailed implementation mode
[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.
[0020] Embodiment 1 Please refer to Figures 1 - 3 , the present invention provides a technical solution: an integrated concrete pouring formwork system for an underground utility tunnel, including a first baffle 2 and a second baffle 11. A cavity is formed between the first baffle 2 and the second baffle 11. The first baffle 2 is connected to the first bearing plate 7 through a crimping oscillation assembly 10. The second baffle 11 is connected to the second bearing plate 9 through a crimping oscillation assembly 10. The second bearing plate 9 is connected to the second crimping rod assembly 6. The first bearing plate 7 is connected to the first crimping rod assembly 4. Both the first crimping rod assembly 4 and the second crimping rod assembly 6 are connected to the drive shaft 3.
[0021] Preferably, a part of the drive shaft 3 is arranged in the drive shaft sleeve 5, and a main bevel gear 13 is fixedly connected to the drive shaft 3; Both the first crimping rod assembly 4 and the second crimping rod assembly 6 include limit sleeves. The limit sleeves are communicated with the drive shaft sleeve 5. A driven bevel gear 14 is arranged in the limit sleeve. The driven bevel gear 14 meshes with the main bevel gear 13. The driven bevel gear 14 is fixedly connected to a threaded rotating shaft. The threaded rotating shaft is threadedly connected to the screw tube 16. A connecting block 18 is fixedly connected to the screw tube 16.
[0022] Preferably, a first limiting ring 15 and a second limiting ring 17 are arranged inside the limiting sleeve. The first limiting ring 15 and the second limiting ring 17 are both fixedly connected to the inner wall of the limiting sleeve. The first limiting ring 15 is sleeved outside the threaded rotating shaft, and the first limiting ring 15 is rotatably connected to the threaded rotating shaft. The second limiting ring 17 is sleeved outside the screw tube 16, and the second limiting ring 17 is rotatably connected to the screw tube 16.
[0023] Preferably, a plurality of the limiting sleeves are provided.
[0024] Preferably, one end of the driving shaft 3 is located outside the driving shaft sleeve 5, and a driving handle 12 is fixedly connected to the end of the driving shaft 3 located outside the driving shaft sleeve 5.
[0025] Preferably, a receiving rod 8 is fixedly connected to the end of the second crimping rod assembly 6 away from the driving shaft sleeve 5, and a second receiving plate 9 is fixedly connected to the receiving rod 8.
[0026] The working principle and beneficial effects of the above solution: In the present invention, concrete is poured into the cavity formed between the first baffle 2 and the second baffle 11 and solidified to form a pipe gallery. Since both the first baffle 2 and the second baffle 11 are arranged on the crimping and oscillating assembly 10, during pouring, impacted by the self-gravity of the concrete and its initial velocity, the crimping and oscillating assembly 10 oscillates, discharging the air bubbles in the concrete, reducing pores, making the concrete dense, and ensuring the quality of the pipe gallery. By the crimping and oscillating assembly 10, the pores of the concrete are reduced, the permeability of the concrete pipe gallery is lowered, thereby improving the durability of the pipe gallery. The ability to resist water erosion is improved, and moisture and air are prevented from rusting the steel bars in the concrete. It solves the problem that in the existing pouring formwork system, additional equipment is required to oscillate the poured concrete during pouring to ensure the construction quality, and the steps are cumbersome.
[0027] Embodiment 2 Please refer to Figure 4 , on the basis of Embodiment 1, the crimping and oscillating assembly 10 includes a connecting shell 1001. The connecting shell 1001 is fixedly connected to the first receiving plate 7 and / or the second receiving plate 9. A sliding rod 1002 is inserted into the inner wall of the connecting shell 1001. The sliding rod 1002 is slidably connected to the inner wall of the connecting shell 1001. A second spring 1005 is arranged between the end of the sliding rod 1002 close to the connecting shell 1001 and the connecting shell 1001. Both ends of the second spring 1005 are respectively connected to the sliding rod 1002 and the connecting shell 1001, and the sliding rod 1002 penetrates through the limiting plate 1004. The limiting plate 1004 is fixedly connected to the connecting shell 1001; One end of the sliding rod 1002 away from the connecting shell 1001 is fixedly connected with a first slider 1008. The first slider 1008 is slidably connected to the adjusting plate 1006. The adjusting plate 1006 is slidably connected to the connecting shell 1001. A first spring 1003 is sleeved outside the sliding rod 1002. Two ends of the first spring 1003 respectively abut against the limiting plate 1004 and the first slider 1008.
[0028] Preferably, a plugging sleeve 1007 is slidably connected to the adjusting plate 1006. A plug rod 1009 is plugged into the plugging sleeve 1007. A third spring 1010 is arranged between the plug rod 1009 and the plugging sleeve 1007. Two ends of the third spring 1010 are respectively connected to the plug rod 1009 and the plugging sleeve 1007. One end of the plug rod 1009 away from the plugging sleeve 1007 is rotatably connected with a second slider 1013. The second slider 1013 is slidably connected to the connecting plate 1014. The connecting plate 1014 is fixedly connected to the first baffle 2 and / or the second baffle 11. A first inclined surface block 1011 is fixedly connected to the plug rod 1009. The first inclined surface block 1011 is slidably connected to a second inclined surface block 1012 fixed on the connecting shell 1001.
[0029] Preferably, an adjusting rod 1015 is fixedly connected to the connecting plate 1014. The adjusting rod 1015 is threadedly connected to an adjusting screw rod 1017. The adjusting screw rod 1017 is rotatably connected to an intermediate block 1016. Two groups of balance plates 1018 are slidably connected to the intermediate block 1016. One end of a connecting rod 1019 is rotatably connected to one end of the balance plate 1018 away from the intermediate block 1016. The other end of the connecting rod 1019 is rotatably connected to a third slider 1020. The third slider 1020 is slidably connected to the adjusting plate 1006. One end of a fourth spring 1021 is connected to the middle section of the connecting rod 1019. The other end of the fourth spring 1021 is connected to the adjusting plate 1006.
[0030] Preferably, a collar 1022 is sleeved outside the plugging sleeve 1007. The collar 1022 is slidably connected to the plugging sleeve 1007. Fifth springs 1023 are arranged between the collar 1022 and the two groups of balance plates 1018.
[0031] The working principle and beneficial effects of the above solution: During pouring, the first baffle 2 and the second baffle 11 are impacted by the self - gravity of the concrete and its initial velocity. The connecting plate 1014 moves closer to the connecting shell 1001. The third spring 1010, the second spring 1005, and the first spring 1003 contract. Under the action of the first inclined - plane block 1011 and the second inclined - plane block 1012, the two groups of insertion rods 1009 move closer to each other, driving the two groups of insertion sleeves 1007 closer. The fifth spring 1023 contracts. And during the process of the connecting plate 1014 moving closer to the connecting shell 1001, the middle block 1016 moves closer to the adjusting plate 1006, the connecting rod 1019 deflects, squeezing the fourth spring 1021. When the contraction amount of the above - mentioned springs reaches the limit, the above - mentioned contracted springs begin to expand. The connecting plate 1014 moves away from the connecting shell 1001, that is, the first baffle 2 and the second baffle 11 connected to the connecting plate 1014 move accordingly, and this process repeats multiple times until the pressure of the poured concrete on the first baffle 2 and the second baffle 11 is balanced with the pressure of the crimping oscillation assembly 10 on the first baffle 2 and the second baffle 11, at which point the oscillation stops. During this oscillation process, the air bubbles in the concrete are discharged, reducing the pores in the concrete, making the concrete more dense, and ensuring the quality of the pipe gallery. By means of the crimping oscillation assembly 10, the pores in the concrete are reduced, the permeability of the concrete pipe gallery is lowered, thereby improving the durability of the pipe gallery. The ability to resist water erosion is enhanced, and the corrosion of the steel bars in the concrete caused by moisture and air is avoided.
[0032] By rotating the adjusting screw 1017, the initial position of the connecting plate 1014 can be changed to make the position of the connecting plate 1014 more suitable. The settings of the first inclined - plane block 1011, the second inclined - plane block 1012, the collar 1022, and the fifth spring 1023 make the movement of the connecting plate 1014 relative to the connecting shell 1001 more balanced, which is beneficial to ensuring the stability of the movement of the connecting plate 1014. It can also make the oscillation of the first baffle 2 and the second baffle 11 more stable, which is beneficial to improving the quality of the pipe gallery.
[0033] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. These are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. The terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly specified and defined, the terms "installed", "connected", "connected to" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Moreover, the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.
[0034] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. An integrated concrete pouring formwork system for an underground integrated pipe gallery, characterized in that: The invention comprises a first baffle plate (2) and a second baffle plate (11), wherein a cavity is formed between the first baffle plate (2) and the second baffle plate (11), the first baffle plate (2) is connected to the first pressure-bearing plate (7) via a crimping oscillating assembly (10), the second baffle plate (11) is connected to the second pressure-bearing plate (9) via a crimping oscillating assembly (10), the second pressure-bearing plate (9) is connected to the second crimping rod assembly (6), the first pressure-bearing plate (7) is connected to the first crimping rod assembly (4), and the first crimping rod assembly (4) and the second crimping rod assembly (6) are both connected to the drive shaft (3).
2. The integrated concrete pouring formwork system for an underground integrated pipe gallery according to claim 1 is characterized in that: The drive shaft (3) is partially disposed in the drive shaft sleeve (5), and a main bevel gear (13) is fixedly connected to the drive shaft (3); The first crimping rod assembly (4) and the second crimping rod assembly (6) both include a limiting sleeve, the limiting sleeve is communicated with the driving shaft sleeve (5), a slave bevel gear (14) is arranged in the limiting sleeve, the slave bevel gear (14) is meshed with the main bevel gear (13), the slave bevel gear (14) is fixedly connected to the threaded shaft, the threaded shaft is threadedly connected to the screw tube (16), and a connecting block (18) is fixedly connected to the screw tube (16).
3. The integrated concrete pouring formwork system for an underground integrated pipe gallery according to claim 2 is characterized in that: A first limiting ring (15) and a second limiting ring (17) are arranged inside the limiting sleeve. The first limiting ring (15) and the second limiting ring (17) are both fixedly connected to the inner wall of the limiting sleeve. The first limiting ring (15) is sleeved on the outside of the threaded shaft. The first limiting ring (15) is rotatably connected to the threaded shaft. The second limiting ring (17) is sleeved on the outside of the screw tube (16). The second limiting ring (17) is rotatably connected to the screw tube (16).
4. The integrated concrete pouring formwork system for an underground integrated pipe gallery according to claim 2 is characterized in that: A plurality of limiting sleeves are provided.
5. The integrated concrete pouring formwork system for an underground integrated pipe gallery according to claim 2 is characterized in that: One end of the drive shaft (3) is located outside the drive shaft sleeve (5), and the end of the drive shaft (3) located outside the drive shaft sleeve (5) is fixedly connected to a drive handle (12).
6. The integrated concrete pouring formwork system for an underground integrated pipe gallery according to claim 1 is characterized in that: One end of the second pressing rod assembly (6) away from the driving shaft sleeve (5) is fixedly connected to a receiving rod (8), and a second pressure bearing plate (9) is fixedly connected to the receiving rod (8).
7. The integrated concrete pouring formwork system for an underground utility corridor according to claim 1 is characterized in that: The crimping oscillation component (10) includes a connecting shell (1001). The connecting shell (1001) is fixedly connected to the first bearing plate (7) and / or the second bearing plate (9). A sliding rod (1002) is inserted into the inner wall of the connecting shell (1001). The sliding rod (1002) is slidably connected to the inner wall of the connecting shell (1001). A second spring (1005) is arranged between the end of the sliding rod (1002) close to the connecting shell (1001) and the connecting shell (1001). The two ends of the second spring (1005) are respectively connected to the sliding rod (1002) and the connecting shell (1001). And the sliding rod (1002) penetrates through a limiting plate (1004). The limiting plate (1004) is fixedly connected to the connecting shell (1001). One end of the sliding rod (1002) far from the connecting shell (1001) is fixedly connected with a first slider (1008). The first slider (1008) is slidably connected to an adjusting plate (1006). The adjusting plate (1006) is slidably connected to the connecting shell (1001). A first spring (1003) is sleeved on the sliding rod (1002). The two ends of the first spring (1003) respectively abut against the limiting plate (1004) and the first slider (1008).
8. The integrated concrete casting formwork system for an underground utility tunnel according to claim 7, wherein: An insertion sleeve (1007) is slidably connected to the adjusting plate (1006). A plug rod (1009) is inserted into the insertion sleeve (1007). A third spring (1010) is arranged between the plug rod (1009) and the insertion sleeve (1007). The two ends of the third spring (1010) are respectively connected to the plug rod (1009) and the insertion sleeve (1007). One end of the plug rod (1009) far from the insertion sleeve (1007) is rotatably connected with a second slider (1013). The second slider (1013) is slidably connected to a connecting plate (1014). The connecting plate (1014) is fixedly connected to the first baffle (2) and / or the second baffle (11). A first inclined surface block (1011) is fixedly connected to the plug rod (1009). The first inclined surface block (1011) is slidably connected to a second inclined surface block (1012) fixed on the connecting shell (1001).
9. The integrated concrete casting formwork system for an underground utility tunnel according to claim 8, wherein: An adjusting rod (1015) is fixedly connected to the connecting plate (1014). The adjusting rod (1015) is threadedly connected to an adjusting screw (1017). The adjusting screw (1017) is rotatably connected to an intermediate block (1016). Two groups of balance plates (1018) are slidably connected to the intermediate block (1016). One end of a connecting rod (1019) far from the intermediate block (1016) is rotatably connected to one end of the balance plate (1018). The other end of the connecting rod (1019) is rotatably connected to a third slider (1020). The third slider (1020) is slidably connected to the adjusting plate (1006). One end of a fourth spring (1021) is connected to the middle section of the connecting rod (1019). The other end of the fourth spring (1021) is connected to the adjusting plate (1006).
10. An integral concrete casting formwork system for an underground utility tunnel, as claimed in claim 9, wherein: A collar (1022) is sleeved outside the insertion sleeve (1007), the collar (1022) is slidably connected to the insertion sleeve (1007), and a fifth spring (1023) is provided between the collar (1022) and the two groups of balance plates (1018).
Citation Information
Patent Citations
Formwork system for concrete pouring of underground comprehensive pipe gallery
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